When the epoxy dried (see previous log entry) I assembled the mouthpiece unit to the main board and the main board into the Hammond box housing. See previous log entries for details. This is the assembled unit:
I tested the sensors with an Arduino program that reads the ADCs of the sensors and streams the data to the host computer.
Everything was working really well so I created a quick patch in Max/MSP to graph the outputs of each of the four sensors: lower lip, tongue/oral cavity, upper lip and breath pressure blowing out/drawing in.
Here is an image of the Max patch with the data graphs.
Here is a link to a one minute recording I just uploaded to YouTube.
The graphs are small but most of the data is very precise, having a dynamic range that uses much of the 0-1023 range of the Teensy 3.2 analog to digital converters.